Guard device for moving structures



Sept. 11, 1934. R. s. QUINN 1,973,445

GUARD DEVICE FOR MOVING STRUCTURES Filed Nov. 27, 1953 s Sheets-Sheet 1Inventor." EOBEET 5. Qu/N/v,

I 6/5 ,49orneys.

Sept. 11, 1934. R. s. QUINN GUARD DEVICE FOR MOVING STRUCTURES FiledNov. 27, 1933 3 Sheets-Sheet -2 Invenfor EQBEET 5. Qu/N/v, .1

Sept. 11, 1 934. QUINN 1,973,445

GUARD DEVICE FOR MOVING STRUCTURES Patented Sept. 11, 1934 -:".".i

, UNITED-STATES PATENT' 'QFFI'CE 13732445. d w

, GUARD DEVICE eoiinov nes oe oiies Robert s. ohm-stamens, OhioApplication November 27, 1933. Serial teens? Claims. (01. 212-70) Thisinvention relates to guard devices, and The boss 6 has an eccentric10"conne'cte'd to more particularly to guard devices for moving itsother end. A link 12 is connected to one of structures, such aslocomotive cranes, although the guards 4 and to the lobe 10 of theeccenot 1i it d th r t tric, as shown at 13 and 14, respectively. An-

s In the operation of locomotive cranes, for other link 15 is connectedto the other of the 603 example, a very dangerous hazard is createdguards 4 and to a centrally offset p on on for men standing beside thecrane truck at the h ar 7, as sh wn at 16 and 17, r sp ctiv l time thecab of the crane is rotating. The un- The e E d Of each o the guards 4is p oguarded cab i n m t crush th workmen vided with a bearing block 18which is adapted 10. against the side of the crane truck, and seriousfor m n i an individua uid 19. the late5 injuries often lt ter beingsecured to the under side of the crane One object of the invention isthe provision cab C y m a s f ap r ws 20. of a novel guard for movingstructures which In D H, the locomotive crane cab C is operates in suchmanner 3,5 to automatically made to rotate in the conventional manner,and

18 push aside men caught by chance in a danger Causes the ar 7 to mesh Wth one of the eg- 70*;

zone, and thus preclude the possibility of their m ta ra ks d p d t, ofu s up n the injury direction of rotation.

Another object is to provide a novel construc- Thi movement causes thelobe 10 of the ection of the class described which will be auto- Centrica d the Offset Pivotal POiht 0 t e 20 matically placed in operativeposition and likea 7 t0 e te d the links 12 d Which 75x? wiseautomatically removed therefrom when its cordingly a o w g the uards 4away from use is unnecessary, thereby resulting in flush the side of thecrane cab. The advanced posiclearances with the moving structure. tionof the curved guards with respect to the These and other objects will beapparent after side of the crane cab ser e t w d 1f workmen referring tothe drawings, in which: standing in the zone of danger, which is at, orso Figure 1 is a plan of a typical locomotive adjacent, the positionrepresented in the drawcrane, and showing the crane arm broken away.ings at X.

Figure 2 is a plan similar to Figure 1, but As the crane cab C continuesto rotate, the disclosing the function of the novel device of gear 7will move out of contact with its initially the invention. cooperatingrack 2, and remain stationary until 5 3 Figure 3 is a plan of theelements of the deit engages the other rack. Cooperation with the viceof the invention as applied to the locomolast mentioned rack causes thegear 7 to rotate tive crane. further and retract the extended guards 4to Figure 4 is a fragmentary elevation. inoperative positions, entirelyunder the crane Figure 5 is an enlarged elevation. cab, providing flushclearances on either side my Figure 6 is a sectional detail. thereof,which is highly essential when the crane Figure '7 is a plan similar tothat of Figure 3, is not operating. but disclosing the device in one ofits stages of It will thus be seen that whenever the crane operation.cab is positioned with its crane arm D extend- 4 0' Referring moreparticularly to the drawings, ing longitudinally with respect to thetruck A,

the letter A designates a conventional railway the curved guards 4 willremain retracted, but truck, which is adapted for movement on the willimmediately move into operative position if tracks B and serves to carrya crane cab C. the crane cab is rotated in either direction.

The crane cab C has connected to one of its While I have shown anddescribed one speends the usua Crane arm cific embodiment of myinvention, it will be un- A pa of segmental Tacks 2 are secured toderstood that I, do not wish to be limited exthe truck A as by means ofbolts A P f actly thereto, since various modifications may curved guards4 are pivoted to the under side be made without departing from the scopeof my of the crane c as at 5, and adapted for invention, as defined inthe following claims. 50 swinging movement toward and away therefrom. Ihu A boss 6 is vertically mounted on the under side A guard device formoving Structures,

of the crane cab C and carries on one of its prising t l t one guardember pivoted t ends a gear 7 which is provided with a retainsaid movingstructure, a shaft journaled on said ing plate 8, the latter being heldin position by moving structure and carrying a gear and an 55 means ofbolts 9. eccentric, a link connecting said guard member support for saidstructure, at least one rack on'; said support, a shaft journaled onsaid moving structure and carrying a gear for engagement with said rack,an eccentric mounted on said shaft, at least one guard member pivoted tosaid moving structure adjacentthe area to be protected, a linkconnecting said eccentric and said guard member, and a guideway for saidguard member.

4. In combination with a locomotive crane, a pair of curved rackssecured to the truck therefor, a shaft journaled on said crane andcarrying a gear for temporary engagement with each of said racks, aneccentric mounted on said shaft, a pair of guard members pivoted on oneof their ends to said crane, and a link connecting each of said guardmembers to said eccentric. i

5. In combination with a locomotive crane, a pair of curved rackssecured to the truck therefor, a shaft journaled on said crane andcarrying a gear for temporary engagement with each of said racks, aneccentric mounted on said,

shaft, a pair of guard members pivoted on one of;.their ends to saidcrane, a guideway for the other end of each of said guards, and a linkconnecting each of said guard members to said eccentric.

ROBERT S. QUINN.

